| Date |
Sanction |
Winner |
Laps
|
| 22 September 1968 |
SCCA Continental Championship Formula A |
George Wintersteen |
70
|
| 6 July 1969 |
SCCA Trans-American Championship |
Parnelli Jones |
84
|
| 10 August 1969 |
SCCA Continental Championship Formula A |
David Hobbs |
69
|
| 13 September 1969 |
USAC Stock Car Series |
Don White |
67
|
| 14 September 1969 |
USAC Champ Car Series |
Dan Gurney |
34
|
| 14 September 1969 |
USAC Champ Car Series |
Gordon Johncock |
34
|
| 5 July 1970 |
SCCA Trans-American Under 2 Litres Championship |
Horst Kwech |
33
|
| 5 July 1970 |
SCCA Trans-American Championship |
Milt Minter |
70
|
| 16 August 1970 |
SCCA Continental Championship Formula A |
David Hobbs |
50
|
| 27 September 1970 |
Can-Am Championship |
Denny Hulme |
70
|
| 3 July 1971 |
SCCA Trans-American Championship Two-Five Challenge |
John Morton |
40
|
| 4 July 1971 |
SCCA Trans-American Championship |
Mark Donohue |
75
|
| 15 August 1971 |
SCCA L&M Formula 5000 |
Brett Lunger |
60
|
| 12 September 1971 |
Can-Am Championship |
Peter Revson |
70
|
| 11 June 1972 |
IMSA Camel GT Championship |
Denny Long |
95
|
| 2 July 1972 |
SCCA Trans-American Championship Two-Five Challenge |
Horst Kwech |
50
|
| 4 July 1972 |
SCCA Trans-American Championship |
George Follmer |
70
|
| 29 July 1972 |
SCCA Robert Bosch-VW Super Vee Championship |
Steve Pieper |
|
| 30 July 1972 |
SCCA L&M Formula 5000 |
Eppie Wietzes |
66
|
| 17 September 1972 |
Can-Am Championship |
Francois Cevert |
70
|
| 7 September 1975 |
SCCA Trans-American Championship |
Jerry Hansen |
33
|
| 15 August 1976 |
SCCA Trans-American Championship |
Carl Shafer |
33
|
| 15 August 1976 |
SCCA Robert Bosch-VW Super Vee Championship |
Tom Bagley |
|
| 19 June 1977 |
IMSA Camel GT Championship |
Danny Ongais |
33
|
| 14 August 1977 |
SCCA Trans-Am Championship |
Peter Gregg |
33
|
| 14 August 1977 |
SCCA Robert Bosch-VW Super Vee Championship |
Herm Johnson |
|
| 18 June 1978 |
IMSA Camel GT Championship |
Peter Gregg |
33
|
| 13 August 1978 |
SCCA Trans-Am Championship |
Jerry Hansen |
33
|
| 13 August 1978 |
SCCA Robert Bosch-VW Super Vee Championship |
Herm Johnson |
|
| 17 June 1979 |
IMSA Camel GT Championship |
Peter Gregg |
33
|
| 19 August 1979 |
SCCA Robert Bosch-VW Super Vee Championship |
Herm Johnson |
|
| 19 August 1979 |
Can-Am Championship |
Jacky Ickx |
40
|
| 15 June 1980 |
IMSA Camel GT Championship |
Luis Mendez |
33
|
| 15 June 1980 |
Formula Atlantic Championship |
Steve Saleen |
|
| 10 August 1980 |
Can-Am Championship |
Patrick Tambay |
40
|
| 10 August 1980 |
SCCA Robert Bosch-VW Super Vee Championship |
Peter Kuhn |
|
| 10 August 1980 |
CRC Chemicals Trans-Am Championship |
John Bauer |
33
|
| 14 June 1981 |
IMSA Camel GT Championship |
Klaus Ludwig |
42
|
| 14 June 1981 |
IMSA Kelly American Challenge |
Vern Smith |
|
| 9 August 1981 |
SCCA Robert Bosch-VW Super Vee Championship |
Al Unser, Jr. |
21
|
| 9 August 1981 |
CRC Chemicals Trans-Am Championship |
Bob Tullius |
33
|
| 11 July 1982 |
IMSA Camel GT Championship |
John Paul, Jr. |
42
|
| 8 August 1982 |
CRC Chemicals Trans-Am Championship |
Paul Newman |
33
|
| 10 July 1983 |
IMSA Camel GT Championship |
Al Holbert
Jim Trueman |
104
|
| 8 August 1983 |
Budweiser Trans-Am Championship |
Willy T. Ribbs |
33
|
| 22 July 1984 |
Budweiser Trans-Am Championship |
Willy T. Ribbs |
33
|
| 22 July 1984 |
Can-Am Championship |
Michael Roe |
40
|
| 21 July 1985 |
Bendix Brake Trans-Am Racing Series |
Willy T. Ribbs |
33
|
| 21 July 1985 |
ECAR Formula Atlantic Championship |
Michael Angus |
15
|
| 20 July 1986 |
Barber Saab Pro Series |
Robby Unser |
20
|
| 20 July 1986 |
Bendix Trans-Am Championship |
Greg Pickett |
33
|
| 18 July 1987 |
SCCA Coors RaceTruck Challenge |
Bobby Archer |
20
|
| 18 July 1987 |
SCCA Escort Endurance Championship |
John Heinricy
Don Knowles
Stu Hayner |
182
|
| 19 July 1987 |
Bendix Trans-Am Championship |
Elliott Forbes-Robinson |
33
|
| 19 July 1987 |
ECAR HFC Pro Series Atlantic Challenge |
Steve Shelton |
25
|
| 16 July 1988 |
SCCA Escort Endurance Championship |
Bob McConnell
Stu Hayner |
89
|
| 17 July 1988 |
SCCA Corvette Challenge Championship |
Andy Pilgrim |
25
|
| 17 July 1988 |
SCCA Coors RaceTruck Challenge |
Jeff Krosnoff |
20
|
| 17 July 1988 |
SCCA Escort Trans-Am Championship |
Hans-Joachim Stuck |
33
|
| 22 July 1989 |
SCCA Escort Endurance Championship |
John Heinricy
Don Knowles |
89
|
| 23 July 1989 |
SCCA Trans-Am Championship |
Irv Hoerr |
33
|
| 23 July 1989 |
SCCA Coors RaceTruck Challenge |
Ray Kong |
17
|
| 27 June 1993 |
ASA ACDelco Challenge Series |
Jimmy Spencer |
60
|
| 26 June 1994 |
ASA ACDelco Challenge Series |
Butch Miller |
60
|
| 25 June 1995 |
ASA ACDelco Challenge Series |
Scott Hansen |
60
|
| 22 August 2004 |
NASCAR AutoZone Elite Division, Midwest Series |
Brian Hoppe |
61
|
| 5 September 2010 |
SCCA Pro Racing Trans-Am Series |
Tony Ave |
36
|
| 3 September 2011 |
SCCA Pro Racing Trans-Am Series |
Tony Ave |
40
|
| 4 September 2011 |
SCCA Pro Racing Trans-Am Series |
Tony Ave |
40
|
| 26 May 2012 |
NASCAR K&N Pro Series West |
Michael Self |
50
|
| 1 September 2012 |
Trans Am Series |
Tony Ave |
40
|
| 2 September 2012 |
Trans Am Series |
Amy Ruman |
40
|
| 25 May 2013 |
NASCAR K&N Pro Series West |
Michael Self |
50
|
| 1 September 2013 |
Trans Am Series |
Doug Peterson |
40
|
| 31 August 2014 |
Trans Am Championship
Trans Am Championship TA2 Class |
Doug Peterson |
40
|
| 5 July 2015 |
Trans Am Championship
Trans Am Championship TA2 Class |
Amy Ruman |
40
|
| 3 July 2016 |
Trans Am Championship |
Paul Fix |
40
|
| 3 July 2016 |
Trans Am Championship TA2 Class |
Gar Robinson |
38
|
| 2 July 2017 |
Trans Am Championship presented by Pirelli |
Cameron Lawrence |
40
|
| 2 July 2017 |
Trans Am Championship TA2 Class |
Tony Buffomante |
40
|
| 12 July 2020 |
Trans Am Championship presented by Pirelli |
Tomy Drissi |
40
|
| 12 July 2020 |
Trans Am Championship TA2 Class |
Mike Skeen |
40
|
| 17 July 2021 |
Formula Regional Americas Championship Powered by Honda |
Ian Rodriguez |
24
|
| 17 July 2021 |
Formula 4 United States Championship powered by Honda |
Nico Christodoulou |
10
|
| 17 July 2021 |
Formula 4 United States Championship powered by Honda |
Mac Clark |
16
|
| 17 July 2021 |
Trans Am Championship presented by Pirelli
Trans Am Championship TA2 Class |
Ernie Francis, Jr. |
40
|
| 18 July 2021 |
Formula 4 United States Championship powered by Honda |
Bryson Morris |
15
|
| 18 July 2021 |
Formula Regional Americas Championship Powered by Honda |
Joshua Car |
21
|
| 18 July 2021 |
Formula Regional Americas Championship Powered by Honda |
Joshua Car |
25
|
